Dense-pack in finished walls
This suits most finished houses where the walls are sound and you'd rather keep your drywall or plaster where it is. We fill the cavities through small holes, close them up, and the rooms go back to normal use.
Wall insulation in North Charleston SC - filled walls without tearing them open
Hot rooms in summer and drafty outside walls in winter? We fill the empty spaces inside your walls through small holes, then close them up.
Can you insulate the walls of a house that's already built?
Wall insulation in North Charleston usually means adding insulation to the walls of a house that's already built. At B&C North Charleston Insulation, we fill the spaces between the studs through small holes from inside or outside, so the rooms along those walls hold their temperature without the walls coming down.
It usually starts with a room on an outside wall that never feels right, a power bill that keeps climbing, or a house old enough that nobody knows what's inside the walls. The price moves with how many walls you want done, whether we work from inside or outside, which material goes in and whether any wet spots or cracks have to be fixed first. The schedule turns on those same repairs and on any permit your address needs, because we settle both before we drill. Your estimate lays out each of those, so you can see what goes where for your house.
Why North Charleston homeowners call us for wall insulation
I look at your walls and write the estimate
I come out to every job myself, check the walls and write the estimate step by step, so you can see what goes where. Our installers do the work with me or a lead installer on site, so someone who knows the plan is there when we drill.
Started in 2023 after years in HVAC
I spent years as an HVAC service tech before starting this business in 2023, and kept finding that leaks and thin insulation were the real trouble. So we fix and seal first, and I'd rather tell you a wall can wait than sell you work your house won't use.
Licensed and fully insured, ask to see it
We're licensed and fully insured, and that's a fair thing to ask about before anyone drills into your walls, so bring it up when I'm out. When you're ready, call (843) 278-0240 or send the form, and tell us which walls you're thinking about.
Get a written plan and price for insulating your walls
Send your address, the walls you want insulated and any damp spots or cracks you've noticed, through the form or at (843) 278-0240. We reply within one business day to set a time for your free on-site estimate. There's no pressure and no obligation, and nothing gets scheduled until you say go.
- Phone
- (843) 278-0240
- Location
- North Charleston, SC 29418
- Hours
- Mon–Sun: 8 AM–9 PM
Wall insulation permits and houses in North Charleston
North Charleston requires proper permits before anyone alters a structure, and building, altering or moving one without them is a misdemeanor in the city. The North Charleston Building Department issues permits for renovations and residential projects and inspects that work too. Whether your wall job needs a permit is the department's call, so we find out which office covers your address, check what it asks for and take care of any permit before we start.
The state licensing board lists insulation installers as their own residential specialty contractor trade, for insulating against heat or sound, and that covers work done for a property owner when the job runs over $500. Most of the wall calls we get here come from older houses where the outside walls were built with little or nothing in them. We're based in North Charleston and do the same work across the cities around it, including Hanahan and Goose Creek, and if your city isn't listed, call and ask.
Questions homeowners ask about wall insulation
What is the best way to insulate walls in an older house without tearing them open?
Dense-packing through small holes is usually the best way, because the cavities get filled with the least disruption to your house. From outside, siding comes off only as far as the cladding needs, and many types, like vinyl, aluminum and steel, can be loosened with a siding tool. From inside, the holes get patched afterward or covered with a chair rail, a strip of trim that runs along the wall.
Is spray foam worth the higher price for existing walls?
Usually not in a finished wall, because spray foam is typically the most expensive way to add insulation to an existing one. Closed-cell foam, the dense kind, insulates more per inch and keeps moisture out, while open-cell foam lets moisture through, so you're weighing price against how each handles water. When the walls are already open for a remodel, foam is easier to justify, and I'll put both side by side on your estimate.
What does wall insulation cost around Charleston?
Insulation installation in the Charleston metro area usually costs about $1,500 to $7,000 per project, and that's the general market for insulation work, not a quote for your walls. Where yours lands turns on the things covered above, like how many walls and whether repairs come first, and your estimate shows each one as its own line.
How do I know if my walls need insulation?
If your outside walls feel cold to the touch in winter, the rooms along them run hot in summer and the house is older, the cavities are often thin or empty. We confirm it by looking into the wall at an outlet or through a small test hole instead of guessing. If the bigger problem turns out to be overhead or underneath, I'll tell you to start with the attic or the crawl space.
Who handles permits for wall insulation in North Charleston?
We do. As covered above, we check what the city's building department asks for at your address and take care of any permit before work starts, so you don't have to chase it yourself.